Pictures providing an “unprecedented look” deep beneath the surface of Glasgow have been unearthed by boreholes.
The city observatory’s specialised equipment has revealed data and images hidden up to 199 metres below the city.
The network of boreholes is watching how warm water moves in abandoned, flooded mine workings under the east end and Rutherglen.
It is part of a project, which will help scientists understand the subsurface better and shed light on how mine water could be used as a renewable energy source for homes and industry.